Shield for furnaces.



No. 654,5l6 Pafented July 24, I900. c. s. CHAPMAN.

SHIELD FOR FURNACES.

(Application filed Apr. 15, 1899.\

(No Mhdeh) I 2 Sheets-Sheet qwibwwwa I m '6 f6? w THE nonms r-z'rzns 2a.. mom-urns WASHINGTON. n. c.

No. 654,5I6. Patented July 24, I900.

C. S. CHAPMAN.

SHIELD F 08 FURNACES.

(Application filed Apr. 15, 1899.)

(No Model.)

2 Sheets-8heet 2,

tutozmmao TTED STATES PATENT Enron.

CHARLES S. CHAPMAN, OF PITTSBURG, KANSAS, ASSIGNOR TO THE PITTS- BURG FOUNDRY AND MACHINE COMPANY, OF SAME PLACE.

SHIELD FOR FURNACES.

SPECIFICATION forming part of Letters PatentNo. 654,516, dated July 24, 1900.

Application filed April 15,1899. Serial No. 713,166- (No model.)

To all whom it may concern:

Be it known that I, CHARLES S. CHAPMAN, a citizen of the United States, residing at Pittsburg, in the county of Crawford and State of Kansas, have invented certain new and useful Improvements in Shields for Furnaces; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in IO the art to which it appertains to make and use the same.

My invention consists in an improved shield for use in connection with metallurgical furnaces hereinafter described, reference being had to the accompanying drawings, which illustrate one form in which I have contemplated embodying my invention, and said inventlon is fully disclosed in the following description and claims.

In the drawings, Figure 1 represents a side view of a portion of a zinc-smelting furnace, showing my improved shield in connection therewith. Fig. 2 represents avertical transverse sectional view of the shield on line 2 2 2 5 of Fig. 1 looking in the direction of the arrow in that figure and showing one of the buckstaves and a vertical series of condensers of the said furnace. Fig. 3 is a detail view of a portion of the shield and ladle supporting devices shown in Fig. 2, illustrating the mechanism for moving'the ladle horizontally toward and from the furnace. Fig. 4 is an enlarged detail view of a portion of the shield and one of the levers and connected devices 3 5 for moving the ladle horizontally.

The object of my invention is to provide a shield for protecting the operator or operators while attending to the furnace, and particularly while drawing off the condensed 40 metal from the condensers thereof, the said shield being provided" with mechanism for moving it longitudinally of the furnace and being also provided with mechanism for supporting the ladle, for raising and lowering the 5 same,and for moving the ladle horizontally toward and from the furnace.

In the drawings, A represents one side of a zinc-smelting furnace provided with a series of retorts, (not shown,) each retort being pro vided with a condenser a.

B represents a supporting-track which extends longitudinally the whole length of the furnace and is supported at intervals by means of brackets Z7, which are preferably secured to certain of the buckstaves A of. the furnace. I prefer to provide these buckstaves with supporting-lugs a a, adapted to engage the bracket 1) above and below the same, and the brackets are bolted or otherwise secured to the bnckstaves.

C C represent vertical hangers provided at their upper end with studs 0, upon which are mounted grooved rollers c, which engage the supporting-track B. One of these rollers o is provided with a sprocket-wheel 0", cast integrally therewith or formed separately and secured thereto, as preferred, as shown at the right in Fig. 1.

D D represent vertically-disposed plates secured at their upper ends to the hangers C C, the said plates being stiffened on the side toward the furnace by means of a suit able strengthening-framework (Z, of angleiron or other structural iron, as indicated in dotted lines in Fig. 1. The hangers C C are connected by means of a horizontal bar E, which is bolted or otherwise secured thereto, and the lower ends-of the plates D D are held in fixed relation with each other by means of a bar F, which is curved inwardly toward the furnace, as indicated in Figs. 1 and 2, in or der that it shall not interfere with the ladle.

G represents a guide-rail secured to the buckstaves of the furnace, near the bottom of the same, and extending the whole length 8 5 of the furnace and provided with a vertical outer face, and the plates D D are provided on their inner faces with brackets d d, carryin g rollers (Z (1 which bear against the vertical face of the guide-rails Grand guide the lower ends of the platesD D when the shield is moved longitudinally of the furnace. The Weight of the shield tends to throw the lower end thereof inward toward the furnace, thus keeping the rollers d d always in contact 5 with the guide-rail G.

D D are wings formed of sheet metal and connected to the outer edges of the plates D D, preferably by hinge connections, as indi cated in Fig. 1, and forming extensions of the 10o plates D. One of the plates D, in this instance the one at the right in Fig. 1, is provided with a horizontal shaft I, mounted in a suitablebearing provided in this instance in a horizontally-arranged brace-bar d secured to the plate D and the framework thereof. The shaft I is provided on the outer side of the plate D with a handwvheel t or other operating device and on the inner side of the plate with a sprocket-wheel 2", which is connected by means of a sprocket-chain t with the sprocket-wheel 0 before described. It will be seen that by turning the hand-Wheeli the sprocket-wheels t" and 0 can be rotated,

thus rotating the roller don the track B and propelling the shield along said track in either direction.

K represents the ladle,provided with a spout k on its inner and outer sides and with laterally-projecting trunnions 7t which are pivotally connected with the lower ends of "ertical arms k 70 The upper ends of the arms is 70 are connected by a bail k having a hook k at its upper end. One of the plates D, in this instance the one at the left in Fig, 1, is provided with a horizontal brace-bar (1", in which is mounted a horizontal shaft L, carrying on the inner side of the plate a windingdrum Z and on the outer side of the plate a large gear-wheel Z, which meshes with a pinion Z mounted on a stud Z secured to the bar 01 said pinion having operatively connected with the same a hand-wheel Z, to which is advantageously secured an operating lever or arm Z provided with a handle Z. The horizontal cross-bar E is provided with one or more (two being shown) grooved rollers e e, and a chain L extends from the winding-drum Z over said rollers c c to the hook 7c of the ladle-supporting bail. By means of this mechanism just described the ladle is supported between the two plates D D of the shield and can be raised and lowered by the operator to bring it beneath any one of a vertical series of condensers a for the purpose of drawing 0% the condensed metal from the condensers into the ladle.

In order to guide the ladle K in its vertical movements and also to enable it to be moved toward and from the furnace, which is frequently necessary to avoid parts projecting from the face thereof, I provide the following mechanism, (illustrated in Figs. 2, 8, and 4 particularlyz) Each of the arms 70 is provided with a short shaft 111, extending through the same, to which is rigidly attached an arm m, provided with a friction-roller m adapted to engage a vertical guiding-groove 01 formed in the inner edge of each plate D, in any desired way. The shaft m is also provided with an operating-lever M, having a handle m and the two operating-levers M M are preferably connected for joint movement by a cross-bar m By means of these levers M the ladle K can be swung outwardly from the furnace, as indicated in Fig. 2. One of the trunnions k of the ladle K is provided with a worm-Wheel 70 and the adjacent arm 70 is provided with a worm-shaft 70 having a worm k in engagement with the worm-wheel Z0 and provided at its outer end with a hand-wheel k By means of this construction the ladle can be tilted to pour its content-s into a mold or other receptacle.

In using myimproved shield for the purpose of drawing off the contents of the condensers the operator will, by means of hand- Wheel 2', move the shield until the ladle is in line with the vertical row of condensers which it is desired to empty. By means of the ladlehoisting mechanism before described the ladle can be placed in position to receive the contents of any one of the condensers of the row, and the contents of said condensers will be successivelywithdrawn into the ladle. The shield will then be moved to the next row of condensers, and so on. If for any reason it should be desired to use the shield without the ladle, the latter can be disengaged therefrom and disconnected from the chain L.

The shield is capable of use without the ladle when found desirable to protect the operator while performing any kind of work close to the sides of the furnace, removing the condensers, and cleaning out the retorts preparatory to recharging, in which case the ladle would not be needed and would only be in the way.

WVhat I claim, and desire to secure by Let ters Patent, is-

1. The combination with a furnace, of .an upper and lower track arranged adjacent thereto, a furnace-shield provided with roll ers engaging the upper track, and with in wardly-extending arms provided with rollers engaging the lower track, substantially as described.

52. The combination with a supporting track, of a furnace-shield provided with rollers engaging said track, propelling mechanism carried by said shield, operative connections between said mechanism and one of said supporting-rollers for moving the shield along said track, substantially as described.

3. The combination with a supportingtrack, of a f urnace-shield provided with rollers engaging said track, a driving shaft carried by said shield and provided with a handoperated device and gearing connecting said shaft with one of said rollers, for propelling said shield along the track, substantially as described.

a. The combination with an upper supportin g-track and a lower guide-rail having a vertical face of a furnace-shield provided with rollers engaging said supporting-track, and having at its lower end friction-rollers bearing against the vertical face of said guiderail, the weight of the shield holding said friction-rolls in engagement with the guiderail, substantially as described.

5. The combination with a supportingtrack, of a furnace-shield provided with a vertically-arranged aperture therein, and hav- IIO ing rollers engaging said track, a ladle carried by said shield located in said vertical aperture, and having guiding devices engaging the shield at each side of said aperture, and means for raising and lowering said ladle in said aperture, substantially as described.

6. The combination with a supporting track of a furnace-shield supported therefrom and movable longitudinally thereof said shield being provided with a central vertical aperture, a ladle carried by said shield and having guiding devices engaging the shield at each side ofsaid aperture, mechanism for raising and lowering said ladle, and mechanism for moving said ladle transversely of the shield, substantially as described.

7. The combination with a supportingtrack, of a furnace-shield supported therefrom and movable longitudinallythereof,said shield being provided With a central vertical aperture, a ladle carried by said shield and located in said aperture, arms pivotally connected With said ladle and provided with friction-rolls engaging guiding portions of said shield, operating-levers connected to said arms, for moving said ladle horizontally transversely of the shield, and mechanism for raising and lowering the ladle, substantially as described.

8. The combination with a supportingtraok of a shield supported therefrom, and movable longitudinally thereof, said shield being provided with a central aperture, driving mechanism carried by said shield, for moving the same longitudinally along said track, and wings hinged to and forming continuations of said shield, substantially as described.

9. The combination with a supportingtrack of a shield supported therefrom and movablelongitudinally thereof, said shield being provided with a central vertical aperture and a guiding-groove at each side of said aperture, a ladle provided with guiding-rollers engaging said groove, and mechanism for raising and lowering said ladle, substantially as described.

In testimony whereof I affix my signature in the presence of two Witnesses.

CHARLES S. OHAPM AN.

Witnesses:

O. ALBERT WETTENGEL, O. G. EMERSON. 

